NEAR-INFRARED CUT FILTER GLASS AND PROCESS FOR MANUFACTURING SAME

摘要

The purpose of the present invention is to provide a near-infrared cut filter glass which has few bubble defects and exhibits high weather resistance. The near-infrared cut filter glass consists of a fluorophosphate-based glass which comprises, in cation percent, 25 to 55% of P5+, 1 to 25% of Al3+, 1 to 50% of R+ (wherein R+ represents the total amount of Li+, Na+ and K+), 1 to 50% of R2+ (wherein R2+ represents the total amount of Mg2+, Ca2+, Sr2+, Ba2+ and Zn2+), 1 to 10% of Cu2+ and 0 to 3% of Sb3+, and comprises, in anion percent, 35 to 95% of O2- and 5 to 65% of F- and which has a ß-OH value of 0.001 to 0.1mm-1.